any other comments?

go to hell fleabay try to be more positive

thanks tom

What are the symptoms of the problem? The original post seems like it should be doing what you want; you grab the point of a parabola, check if it's ≥ to the magic number, and then set it to the magic number if it is.

I do notice however that you're printing the value of y (with cout) before applying this clamping. Could that be causing you to think that your code doesn't work? What happens if you move the cout to after the if block?

I also notice that you generate the points in the parabola differently than you iterate through them; could you be mis-counting the number of points you're expecting to have (hence the subscript out of range) errors?

I took out the magic numbers. Here is my updated code.

#include <iostream>
#include <vector>

using namespace std;

vector <float> parabola;
float i = 0.0f, y = 0.0f, tier_one = 49.975f;
int state = 0;

void count()
{
	for (float x = 22.5f; x >= -22.5f; x--)
	{
		y = (-0.1f * (x * x)) + 50;
		parabola.push_back(y);
	}
}

int main()
{
	for (int j = 0; j < 46; j++)
	{
		count();
		if (state == 0)
		{
			y = parabola[i];
			i++;
		}
		if (y >= tier_one)
		{
			state = 1;
		}
		if (state == 1)
		{
			y = tier_one;
		}
		cout << y << endl;
	}
	return 0;
}